body {
    width: 100%;
    height: 100%;
    background-color: #Fff;
    .m {
        margin: 0 auto;
    }

    .head {
        width: 100%;
        height: 63px;   
        border-bottom: 1px solid #F3F5F6;

        .head-a {
            width: 1152px;
            height: 100%;
            float: none;
        }

        .head-left {
            float: left;
            width: 700px;
            a {
                float: left;
                display: block;
                text-align: center;
                font-size: 16px;
                line-height: 63px;
                color: #545C63;
                padding: 0, 12px;
            }
            a:hover {
                color:#1c1f21 ;
                
            }
            .a{
                width: 104px;
            }
            .b{
                width: 72px;
            }
            .c{
                width: 88px;
            }
            .e{
                width: 56px;
            }
        }

        .head-right {
            width: 340px;
            height: 100%;
            float: right;
            a {
                float: left;
                display: block;
                text-align: center;
                font-size: 16px;
                line-height: 63px;
                color: #545C63;
                padding: 0, 12px;
            }
            a:hover {
                color:#1c1f21 ;
                
            }
            .a{
                img{
                    width: 22px;
                    height: 22px;
                }
            }
            .b{
            }
            .c{
            }
            .e{
            }
        }
    }

    .middle {
        width: 100%;
        height: 500px;
        background-color: chartreuse;
    }

    .bottom {
        width: 100%;
        height: 80px;
        background-color: #eee;
    }
}